Frequency Distributions
This site provides and introduction to frequency distributions as well as providing links to other statistics topics.
http://mathworld.wolfram.com/FrequencyDistribution.html

Statistical Graphs
This excellent site provides discussion of various kinds of statistical graphs.
http://www.mathleague.com/help/data/data.htm

Glossary of Statistical Terms
This excellent site can help you whenever you have a question about a statistical term.
http://www.stat.Berkeley.EDU/users/stark/SticiGui/Text/

Statistical Resources
The University of Michigan Documents Center has an excellent site of Statistical Resources on the web. You might wish to explore the richness of this site when you have time or look up a particular item if you are having trouble.
http://www.lib.umich.edu/govdocs/stats.html